Cowles Threshold Days by Year (USC00292139)
13 fixed thresholds counted per year at Cowles (USC00292139): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Cowles Thresholds
- Cowles: days with 10 mm (0.39 in) or more of precipitation in 39 years, most in 1919 with 35.
- Cowles: days with a maximum temperature at or below 0 C (32 F) in 38 years, most in 1915 with 29.
- Cowles: nights with a minimum temperature at or below 0 C (32 F) in 37 years, most in 1957 with 287.
- Cowles: nights with a minimum temperature at or below -10 C (14 F) in 37 years, most in 1959 with 124.
- 13 fixed thresholds have at least one qualifying day at Cowles.
Days at or above 30 C (86 F)
26 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1898 | 4 | 2.5 |
| 1899 | 1 | 2.5 |
| 1900 | 9 | 3.5 |
| 1902 | 3 | 3.5 |
| 1903 | 1 | 3.5 |
| 1907 | 1 | 3.5 |
| 1922 | 9 | 3.3 |
| 1923 | 4 | 3.3 |
| 1924 | 4 | 3.3 |
| 1925 | 1 | 3.3 |
| 1926 | 1 | 3.3 |
| 1927 | 3 | 3.3 |
| 1928 | 1 | 3.3 |
| 1930 | 3 | 5.7 |
| 1931 | 2 | 5.7 |
| 1933 | 3 | 5.7 |
| 1934 | 3 | 5.7 |
| 1936 | 18 | 5.7 |
| 1937 | 7 | 5.7 |
| 1938 | 4 | 5.7 |
| 1955 | 1 | 3 |
| 1956 | 3 | 3 |
| 1957 | 5 | 3 |
| 1958 | 5 | 3 |
| 1959 | 1 | 3 |
| 1960 | 1 | 1 |
| Year | First date | Last date |
|---|---|---|
| 1898 | 1898-06-28 | 1898-07-29 |
| 1899 | 1899-08-28 | 1899-08-28 |
| 1900 | 1900-06-27 | 1900-08-28 |
| 1902 | 1902-06-24 | 1902-08-04 |
| 1903 | 1903-06-27 | 1903-06-27 |
| 1907 | 1907-07-23 | 1907-07-23 |
| 1922 | 1922-06-09 | 1922-08-31 |
| 1923 | 1923-06-29 | 1923-07-30 |
| 1924 | 1924-06-13 | 1924-08-24 |
| 1925 | 1925-07-15 | 1925-07-15 |
| 1926 | 1926-08-26 | 1926-08-26 |
| 1927 | 1927-07-16 | 1927-07-20 |
| 1928 | 1928-06-27 | 1928-06-27 |
| 1930 | 1930-06-11 | 1930-06-13 |
| 1931 | 1931-06-24 | 1931-07-22 |
| 1933 | 1933-06-10 | 1933-09-06 |
| 1934 | 1934-06-12 | 1934-08-01 |
| 1936 | 1936-06-17 | 1936-08-25 |
| 1937 | 1937-07-21 | 1937-08-10 |
| 1938 | 1938-07-09 | 1938-08-06 |
| 1955 | 1955-07-10 | 1955-07-10 |
| 1956 | 1956-06-03 | 1956-06-13 |
| 1957 | 1957-06-28 | 1957-07-03 |
| 1958 | 1958-07-10 | 1958-07-14 |
| 1959 | 1959-08-10 | 1959-08-10 |
| 1960 | 1960-06-28 | 1960-06-28 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 26 | 18 | 1936 | 1 |
| 90 F (32.2 C): Days | 1 | 2 | 1957 | 2 |
| 0 C (32 F): Ice days (max | 38 | 29 | 1915 | 26 |
| 0 C (32 F): Frost days (min | 37 | 287 | 1957 | 269 |
| -10 C (14 F): Days with min | 37 | 124 | 1959 | 102 |
| -20 C (-4 F): Days with min | 36 | 32 | 1960 | 32 |
| -30 C (-22 F): Days with min | 2 | 3 | 1899 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 39 | 35 | 1919 | 17 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 35 | 6 | 1955 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 6 | 2 | 1931 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 30 | 15 | 1913 | 7 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 18 | 2 | 1916 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 1 | 1 | 1933 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1898.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2025-12-31).